121959361 has 4 divisors (see below), whose sum is σ = 123216772. Its totient is φ = 120701952.

The previous prime is 121959359. The next prime is 121959373. The reversal of 121959361 is 163959121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163959121 = 1499 ⋅109379.

It can be written as a sum of positive squares in 2 ways, for example, as 18326961 + 103632400 = 4281^2 + 10180^2 .

It is a cyclic number.

It is not a de Polignac number, because 121959361 - 2¹ = 121959359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121959361.

It is not an unprimeable number, because it can be changed into a prime (121959311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628560 + ... + 628753.

It is an arithmetic number, because the mean of its divisors is an integer number (30804193).

Almost surely, 2^121959361 is an apocalyptic number.

It is an amenable number.

121959361 is a deficient number, since it is larger than the sum of its proper divisors (1257411).

121959361 is an equidigital number, since it uses as much as digits as its factorization.

121959361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257410.

The product of its digits is 14580, while the sum is 37.

The square root of 121959361 is about 11043.5212228709. The cubic root of 121959361 is about 495.9124902522.

The spelling of 121959361 in words is "one hundred twenty-one million, nine hundred fifty-nine thousand, three hundred sixty-one".